2105521102 has 8 divisors (see below), whose sum is σ = 3162434112. Its totient is φ = 1051376400.

The previous prime is 2105521037. The next prime is 2105521109. The reversal of 2105521102 is 2011255012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2105521102² = 8866438221934588808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2105521102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105521109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690174 + ... + 693217.

It is an arithmetic number, because the mean of its divisors is an integer number (395304264).

Almost surely, 2^2105521102 is an apocalyptic number.

2105521102 is a deficient number, since it is larger than the sum of its proper divisors (1056913010).

2105521102 is a wasteful number, since it uses less digits than its factorization.

2105521102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384154.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 2105521102 is about 45885.9575687377. The cubic root of 2105521102 is about 1281.7004381839.

Adding to 2105521102 its reverse (2011255012), we get a palindrome (4116776114).

The spelling of 2105521102 in words is "two billion, one hundred five million, five hundred twenty-one thousand, one hundred two".